Last issue of AW&ST has article stating "Following a three-year delay
to correct software problems, the FAA has commissioned the Wide Area
Augmentation System (WAAS) to refine GPS guidance for en route and
approaches"..........................

"It will take years for the FAA to design and certify approaches to
runways at the current rate of about 300 per year." ..................

"by using WAAS and GPS as the sole means of navigation, aircraft can
operate lower and still be safely above terrain and
obstacles."........

"Dan Hanlon, FAA's WAAS program manager, emphasized that the two key
benefits that WAAS has over GPS are vertical guidance and improved
availability of signals"..............

"the FAA has spent $886 million on WAAS to date" ....................

So now you know )

Big John.